JP6967994B2 - Lubricating oil supply device - Google Patents

Lubricating oil supply device Download PDF

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Publication number
JP6967994B2
JP6967994B2 JP2018030915A JP2018030915A JP6967994B2 JP 6967994 B2 JP6967994 B2 JP 6967994B2 JP 2018030915 A JP2018030915 A JP 2018030915A JP 2018030915 A JP2018030915 A JP 2018030915A JP 6967994 B2 JP6967994 B2 JP 6967994B2
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hole
lubricating oil
rotating shaft
supply device
oil supply
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JP2019143773A (en
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翔大 安川
敬士 ▲葛▼原
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/042Guidance of lubricant
    • F16H57/0421Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0423Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/042Guidance of lubricant
    • F16H57/0421Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0426Means for guiding lubricant into an axial channel of a shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/042Guidance of lubricant
    • F16H57/043Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0434Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0467Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469Bearings or seals
    • F16H57/0471Bearing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0467Elements of gearings to be lubricated, cooled or heated
    • F16H57/0476Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Description

本発明は、回転軸内の油路を介して潤滑油を供給する潤滑油供給装置に関する。 The present invention relates to a lubricating oil supply device that supplies lubricating oil via an oil passage in a rotating shaft.

この種の装置として、従来、車両用の変速機の回転軸の内部に、軸方向に潤滑油供給孔を穿設するとともに、潤滑油供給孔と回転軸を径方向に貫通して潤滑油供給孔に連通する軸方向複数の供給孔とを介して、回転軸の周囲の軸方向複数の部品に潤滑油を供給するようにした装置が知られている(例えば特許文献1参照)。 As a device of this type, conventionally, a lubricating oil supply hole is bored inside the rotary shaft of a transmission for a vehicle in the axial direction, and the lubricating oil is supplied by penetrating the lubricating oil supply hole and the rotary shaft in the radial direction. A device is known in which lubricating oil is supplied to a plurality of axial parts around a rotating shaft through a plurality of axial supply holes communicating with the holes (see, for example, Patent Document 1).

特開2002−310271号公報Japanese Patent Application Laid-Open No. 2002-310271

このような装置では、回転軸の周囲の各部に必要十分な量のオイルを供給するために、回転軸内の滑油供給孔の全容積をオイルで満たしておく必要があり、多くの油量が必要となる。このため、ポンプ容量が大型化し、コストの上昇を招く。 In such a device, in order to supply a necessary and sufficient amount of oil to each part around the rotating shaft, it is necessary to fill the entire volume of the lubricating oil supply hole in the rotating shaft with oil, and a large amount of oil is required. Is required. Therefore, the pump capacity becomes large, which leads to an increase in cost.

本発明の一態様は、オイルポンプから供給された潤滑油を、回転軸に穿設された軸方向の第1孔と、第1孔に連通して回転軸を径方向に貫通する第2孔とを介して、回転軸の周囲の各部に供給する潤滑油供給装置であって、軸方向に沿って第1孔に収容され、オイルポンプから供給された潤滑油が導かれるとともに、径方向に貫通孔が穿設された管部材と、管部材の外周面から第1孔の周面にかけて径方向に延在し、第2孔と貫通孔とに連通する環状空間を形成する軸方向一対の板部材と、を備え、第2孔と貫通孔とは、それぞれ軸方向複数箇所に穿設され、一対の板部材は、軸方向複数の第2孔と貫通孔とに対応して軸方向複数箇所に設けられる。 In one aspect of the present invention, the lubricating oil supplied from the oil pump is passed through the first hole in the axial direction formed in the rotary shaft and the first hole, and the second hole penetrates the rotary shaft in the radial direction. It is a lubricating oil supply device that supplies various parts around the rotating shaft via the above, and is accommodated in the first hole along the axial direction, and the lubricating oil supplied from the oil pump is guided and radially. A pair of axially extending pipe members having a through hole and extending radially from the outer peripheral surface of the pipe member to the peripheral surface of the first hole to form an annular space communicating with the second hole and the through hole. A plate member is provided , and the second hole and the through hole are bored at a plurality of positions in the axial direction, respectively, and the pair of plate members are provided with a plurality of axial holes corresponding to the plurality of second holes and the through holes in the axial direction. Ru provided at a location.

本発明によれば、オイルポンプを大型化することなく、回転軸の周囲の各部に必要十分な量の潤滑油を容易に供給することができる。 According to the present invention, it is possible to easily supply a necessary and sufficient amount of lubricating oil to each part around the rotating shaft without increasing the size of the oil pump.

本発明の実施形態に係る潤滑油供給装置が適用される車両駆動装置の全体構成を示す断面図。FIG. 3 is a cross-sectional view showing an overall configuration of a vehicle drive device to which the lubricating oil supply device according to the embodiment of the present invention is applied. 本発明の実施形態に係る潤滑油供給装置の要部構成を示す図1の要部拡大図。FIG. 1 is an enlarged view of a main part of FIG. 1 showing a main part configuration of a lubricating oil supply device according to an embodiment of the present invention. 図2の潤滑油供給装置に含まれるパイプユニットの斜視図。FIG. 3 is a perspective view of a pipe unit included in the lubricating oil supply device of FIG.

以下、図1〜図3を参照して本発明の実施形態について説明する。本発明の実施形態に係る潤滑油供給装置は、回転軸内の油路を介して回転軸の周囲の各部に潤滑油を供給するように構成される種々の装置に適用することができるが、以下では、特に車両駆動装置に潤滑油供給装置を適用する例を説明する。図1は、本発明の実施形態に係る潤滑油供給装置が適用される車両駆動装置の全体構成を示す断面図である。なお、以下では、便宜上、図示のように左右方向を定義し、この定義に従い各部の構成を説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. The lubricating oil supply device according to the embodiment of the present invention can be applied to various devices configured to supply lubricating oil to various parts around the rotating shaft via an oil passage in the rotating shaft. In the following, an example of applying the lubricating oil supply device to the vehicle drive device will be described in particular. FIG. 1 is a cross-sectional view showing an overall configuration of a vehicle drive device to which the lubricating oil supply device according to the embodiment of the present invention is applied. In the following, for convenience, the left-right direction is defined as shown in the figure, and the configuration of each part will be described according to this definition.

図1に示すように、車両駆動装置100は、走行駆動源として電動の走行モータ1を有する。走行モータ1から出力されたトルクは、変速機構2および差動機構3を介して左右のドライブシャフト4に伝達され、これにより車両が走行する。このように車両は、走行モータ1を駆動源として備えており、例えば電気自動車として構成される。なお、車両は、エンジンを駆動源として走行するものでもよいし、エンジンと走行モータとを駆動源として走行するものであってもよい。 As shown in FIG. 1, the vehicle drive device 100 has an electric travel motor 1 as a travel drive source. The torque output from the traveling motor 1 is transmitted to the left and right drive shafts 4 via the transmission mechanism 2 and the differential mechanism 3, whereby the vehicle travels. As described above, the vehicle includes the traveling motor 1 as a drive source, and is configured as, for example, an electric vehicle. The vehicle may be driven by an engine as a drive source, or may be driven by an engine and a traveling motor as a drive source.

走行モータ1は、左右方向の軸線CL1を中心に回転する略円筒形状のロータ11と、ロータ11の周囲に配置されたステータ12とを有し、全体がケース5の内部に収容される。走行モータ1は、例えば埋込磁石同期モータとして構成される。なお、磁石を有しない同期リラクタンスモータやスイッチドリラクタンスモータ等を、走行モータ1として用いることもできる。 The traveling motor 1 has a substantially cylindrical rotor 11 that rotates about the axis CL1 in the left-right direction, and a stator 12 that is arranged around the rotor 11, and the entire motor 1 is housed inside the case 5. The traveling motor 1 is configured as, for example, an embedded magnet synchronous motor. A synchronous reluctance motor, a switch reluctance motor, or the like having no magnet can also be used as the traveling motor 1.

ステータ12は、ロータ11の外周面から径方向所定長さのギャップを介して配置された、軸線CL1を中心とした略円筒形状のステータコア13を有する。ステータコア13は固定子鉄心であり、その周縁部が貫通ボルト13aによりケース5に固定される。ステータコア13の内周面には径方向外側に向けて周方向複数のスロットが設けられ、各スロットに集中巻または分布巻により巻線14(コイル)が配置される。巻線14に三相交流電流を流すことにより回転磁界が発生し、ロータ11が回転する。 The stator 12 has a substantially cylindrical stator core 13 centered on the axis CL1 arranged from the outer peripheral surface of the rotor 11 via a gap having a predetermined radial length. The stator core 13 is a stator core, and its peripheral edge is fixed to the case 5 by a through bolt 13a. A plurality of slots in the circumferential direction are provided on the inner peripheral surface of the stator core 13 toward the outer side in the radial direction, and the winding 14 (coil) is arranged in each slot by centralized winding or distributed winding. A rotating magnetic field is generated by passing a three-phase alternating current through the winding 14, and the rotor 11 rotates.

ロータ11は、軸線CL1を中心とした略円筒形状の軸部15と、軸部15の外周面に嵌合され、軸部15と一体に回転するロータコア16とを有する。軸部15の内部には、軸線CL1を中心とした略円筒形状の回転軸60がスプラインを介して挿入(スプライン結合)され、軸部15と回転軸60とは一体に回転する。 The rotor 11 has a substantially cylindrical shaft portion 15 centered on the axis CL1 and a rotor core 16 that is fitted to the outer peripheral surface of the shaft portion 15 and rotates integrally with the shaft portion 15. Inside the shaft portion 15, a substantially cylindrical rotating shaft 60 centered on the axis CL1 is inserted via a spline (spline coupling), and the shaft portion 15 and the rotating shaft 60 rotate integrally.

回転軸60の左右両端部は、軸部15の左右両端面よりも右方および左方にそれぞれ突出する。回転軸60は、軸部15の左右両側において、ベアリング31,32を介してケース5から、すなわちケース5に設けられたベアリング支持部51,52から回転可能に支持される。ベアリング31は、回転軸60の左端部に設けられ、回転軸17の外周面には、ベアリング31と軸部15の左端面との間に、コッター33とレゾルバ34とが左右に並べて設けられる。コッター33は、回転軸60に嵌合された部品(ロータ11等)の抜け止めとして機能する。レゾルバ34は、ロータ11の回転数を検出する。 The left and right ends of the rotating shaft 60 project to the right and to the left of the left and right ends of the shaft 15, respectively. The rotary shaft 60 is rotatably supported from the case 5, that is, from the bearing support portions 51 and 52 provided on the case 5, via the bearings 31 and 32 on both the left and right sides of the shaft portion 15. The bearing 31 is provided on the left end portion of the rotating shaft 60, and the cotter 33 and the resolver 34 are provided side by side on the outer peripheral surface of the rotating shaft 17 between the bearing 31 and the left end surface of the shaft portion 15. The cotter 33 functions as a retaining member for parts (rotor 11 and the like) fitted to the rotating shaft 60. The resolver 34 detects the rotation speed of the rotor 11.

ベアリング32は、ロータ11の軸部15の右端面に当接して配置される。回転軸60の外周面には、ベアリング32の右方において全周にわたってギヤ61が設けられる。さらに、回転軸60の外周面には、ギヤ61の右方に、スプラインを介してパーキングギヤ35が嵌合(スプライン結合)され、回転軸60とパーキングギヤ35とは一体に回転する。 The bearing 32 is arranged in contact with the right end surface of the shaft portion 15 of the rotor 11. A gear 61 is provided on the outer peripheral surface of the rotating shaft 60 over the entire circumference on the right side of the bearing 32. Further, a parking gear 35 is fitted (spline-coupled) on the outer peripheral surface of the rotating shaft 60 via a spline on the right side of the gear 61, and the rotating shaft 60 and the parking gear 35 rotate integrally.

パーキングギヤ35には、ケース5に揺動可能に支持された図示しないパーキングポールの爪部が係合可能に設けられる。パーキングアクチュエータの駆動によりパーキングポールが揺動され、パーキングポールの爪部がパーキングギヤ35に係合すると、パーキング装置が作動し、爪部の係合が解除されると、パーキング装置の作動が解除される。回転軸60の右端部には、パーキングギヤ35に隣接してナット36が締結される。 The parking gear 35 is provided with a claw portion of a parking pole (not shown) swingably supported by the case 5 so as to be engaged with the parking gear 35. When the parking pole is swung by the drive of the parking actuator and the claw portion of the parking pole engages with the parking gear 35, the parking device is activated, and when the claw portion is disengaged, the operation of the parking device is released. NS. A nut 36 is fastened to the right end of the rotating shaft 60 adjacent to the parking gear 35.

走行モータ1の右方には、変速機構2を構成する回転体20が配置される。回転体20の軸部21は、その左右両端部が左右方向の軸線CL2を中心にベアリング22,23を介してケース5から、すなわちケース5に設けられたベアリング支持部53,54から回転可能に支持される。軸部21には大径ギヤ24と小径ギヤ25とが設けられ、大径ギヤ24は回転軸60の外周面のギヤ61に噛合される。 A rotating body 20 constituting the speed change mechanism 2 is arranged on the right side of the traveling motor 1. The left and right ends of the shaft portion 21 of the rotating body 20 can rotate from the case 5 via the bearings 22 and 23 around the axis CL2 in the left-right direction, that is, from the bearing support portions 53 and 54 provided in the case 5. Be supported. The shaft portion 21 is provided with a large-diameter gear 24 and a small-diameter gear 25, and the large-diameter gear 24 is meshed with a gear 61 on the outer peripheral surface of the rotating shaft 60.

小径ギヤ25は差動機構3のリングギヤ3aに噛合される。これにより、走行モータ1のトルクが、回転軸60、ギヤ61、大径ギヤ24、小径ギヤ25、リングギヤ3aおよび差動機構3を介して左右のドライブシャフト4に入力される。その結果、図示しない左右の駆動輪が駆動され、車両が走行する。 The small diameter gear 25 is meshed with the ring gear 3a of the differential mechanism 3. As a result, the torque of the traveling motor 1 is input to the left and right drive shafts 4 via the rotary shaft 60, the gear 61, the large diameter gear 24, the small diameter gear 25, the ring gear 3a, and the differential mechanism 3. As a result, the left and right drive wheels (not shown) are driven, and the vehicle runs.

このように構成された車両駆動装置100の各部には、オイルポンプ6から吐出された潤滑油が油路を介して供給される。油路は、ケース5の右側壁に沿って延設された第1油路PA1と、軸線CL1に沿って左右方向に延在し、回転軸60内を通過する第2油路PA2と、ケース5の左側壁に沿って延設された第3油路PA3とを含む。第1油路PA1にはオイルポンプ6が接続され、第1油路PA1の潤滑油は第2油路PA2を介して第3油路PA3へと流れる。回転軸60内(第2油路PA2)を通過する潤滑油は、回転軸60を径方向に貫通する孔を介して、回転軸60の周囲に配置されたロータ11などの部品に供給される。 Lubricating oil discharged from the oil pump 6 is supplied to each part of the vehicle drive device 100 configured in this way via an oil passage. The oil passages include a first oil passage PA1 extending along the right side wall of the case 5, a second oil passage PA2 extending in the left-right direction along the axis CL1 and passing through the rotation shaft 60, and a case. Includes a third oil passage PA3 extending along the left wall of 5. An oil pump 6 is connected to the first oil passage PA1, and the lubricating oil of the first oil passage PA1 flows to the third oil passage PA3 via the second oil passage PA2. The lubricating oil that passes through the rotating shaft 60 (second oil passage PA2) is supplied to parts such as the rotor 11 arranged around the rotating shaft 60 through a hole that penetrates the rotating shaft 60 in the radial direction. ..

ところで、車両が傾斜することにより、あるいは車両に前後方向や左右方向の加速度が作用することにより、回転軸60内の潤滑油が偏るおそれがあり、その結果、回転軸60の周囲の各部に十分な量の潤滑油を供給することが困難となるおそれがある。これを避けるためには、軸線CL1に沿った回転軸60内の孔に潤滑油を充満させておく必要があるが、そのためには、ポンプ容量を増大する必要があり、オイルポンプ6が大型化して、コストの上昇を招く。そこで、本実施形態では、オイルポンプ6を大型化することなく回転軸60の周囲の各部に必要十分な潤滑油を供給可能とするため、以下のように潤滑油供給装置を構成する。 By the way, there is a possibility that the lubricating oil in the rotating shaft 60 may be biased due to the inclination of the vehicle or the action of acceleration in the front-rear direction or the left-right direction on the vehicle, and as a result, sufficient parts around the rotating shaft 60 are sufficiently used. It may be difficult to supply a large amount of lubricating oil. In order to avoid this, it is necessary to fill the hole in the rotating shaft 60 along the axis CL1 with lubricating oil, but for that purpose, it is necessary to increase the pump capacity, and the oil pump 6 becomes large. This leads to an increase in cost. Therefore, in the present embodiment, in order to be able to supply the necessary and sufficient lubricating oil to each part around the rotating shaft 60 without increasing the size of the oil pump 6, the lubricating oil supply device is configured as follows.

図2は、本実施形態に係る潤滑油供給装置の要部構成を示す図(図1の要部拡大図)である。図2に示すように、回転軸60の中心部には左端面から右端面にかけて軸線CL1に沿って略円筒面形状の貫通孔62が開口される。回転軸60には、軸方向所定位置にそれぞれ径方向複数の貫通孔63が開口される。貫通孔63は、潤滑油の供給箇所に対応して例えば軸方向4箇所(位置A〜位置D)に設けられる。なお、位置A〜位置Dの貫通孔63をそれぞれ63A〜63Dで表す。 FIG. 2 is a diagram (enlarged view of the main part of FIG. 1) showing a main part configuration of the lubricating oil supply device according to the present embodiment. As shown in FIG. 2, a through hole 62 having a substantially cylindrical surface shape is opened in the central portion of the rotating shaft 60 from the left end surface to the right end surface along the axis CL1. A plurality of radial through holes 63 are opened in the rotating shaft 60 at predetermined positions in the axial direction. The through holes 63 are provided at, for example, four axial directions (positions A to D) corresponding to the lubricating oil supply points. The through holes 63 at positions A to D are represented by 63A to 63D, respectively.

貫通孔63Aは、レゾルバ34の径方向内側に位置する。貫通孔63Aを介して回転軸60の外側に流出した潤滑油は、ロータ11に沿って流れ、これによりロータ11を冷却することができる。すなわち、位置Aの貫通孔63Aは、主にロータ冷却用の油路を構成する。 The through hole 63A is located inside the resolver 34 in the radial direction. The lubricating oil that has flowed out of the rotating shaft 60 through the through hole 63A flows along the rotor 11, whereby the rotor 11 can be cooled. That is, the through hole 63A at the position A mainly constitutes an oil passage for cooling the rotor.

貫通孔63Bは、ロータ11の軸部15の径方向内側に位置する。貫通孔63Bを介して回転軸60の外側に流出した潤滑油は、回転軸60の外周面と軸部15の内周面との間の隙間に沿って流れた後、軸部15とロータコア16との間の嵌合面に沿って流れ、これによりロータ11を潤滑する。すなわち、位置Bの貫通孔63Bは、主にロータ潤滑用の油路を構成する。 The through hole 63B is located inside the shaft portion 15 of the rotor 11 in the radial direction. The lubricating oil that has flowed out of the rotating shaft 60 through the through hole 63B flows along the gap between the outer peripheral surface of the rotating shaft 60 and the inner peripheral surface of the shaft portion 15, and then flows along the gap between the shaft portion 15 and the rotor core 16. Flows along the mating surface between and lubricates the rotor 11. That is, the through hole 63B at the position B mainly constitutes an oil passage for lubricating the rotor.

貫通孔63Cは、軸部15とベアリング32との境界部の径方向内側に位置する。貫通孔63Cを介して回転軸60の外側に流出した潤滑油は、ベアリング32に供給され、ベアリング32を潤滑する。すなわち、位置Cの貫通孔63Cは、主にベアリング潤滑用の油路を構成する。 The through hole 63C is located radially inside the boundary portion between the shaft portion 15 and the bearing 32. The lubricating oil that has flowed out of the rotating shaft 60 through the through hole 63C is supplied to the bearing 32 and lubricates the bearing 32. That is, the through hole 63C at the position C mainly constitutes an oil passage for bearing lubrication.

貫通孔63Dは、パーキングギヤ35の径方向内側に位置する。貫通孔63Dを介して回転軸60の外側に流出した潤滑油は、パーキングギヤ35の嵌合部であるスプラインに供給され、スプラインを潤滑する。すなわち、位置Dの貫通孔63Dは、主にスプライン潤滑用の油路を構成する。 The through hole 63D is located inside the parking gear 35 in the radial direction. The lubricating oil that has flowed out of the rotating shaft 60 through the through hole 63D is supplied to the spline, which is the fitting portion of the parking gear 35, and lubricates the spline. That is, the through hole 63D at the position D mainly constitutes an oil passage for spline lubrication.

貫通孔62の内部には、軸線CL1に沿ってパイプユニット40が挿入される。図3は、パイプユニット40の一部の斜視図である。図3に示すように、パイプユニット40は、軸線CL1に沿って左右方向に延在する貫通孔62よりも小径の円環状のパイプ41と、パイプ41の外周面に取り付けられた左右一対のプレート(左プレート42、右プレート43)とを有する。図2に示すように、左右一対のプレート42,43は、潤滑油の供給箇所に対応して軸方向4箇所(位置A〜位置D)に設けられる。パイプ41の右端部には潤滑油が流入する流入口41aが開口され、左端部には潤滑油が流出する流出口41bが開口される。 The pipe unit 40 is inserted into the through hole 62 along the axis CL1. FIG. 3 is a perspective view of a part of the pipe unit 40. As shown in FIG. 3, the pipe unit 40 includes an annular pipe 41 having a diameter smaller than that of the through hole 62 extending in the left-right direction along the axis CL1 and a pair of left and right plates attached to the outer peripheral surface of the pipe 41. (Left plate 42, right plate 43). As shown in FIG. 2, the pair of left and right plates 42, 43 are provided at four axial directions (positions A to D) corresponding to the lubricating oil supply points. An inflow port 41a into which the lubricating oil flows is opened at the right end of the pipe 41, and an outflow port 41b through which the lubricating oil flows is opened at the left end.

図2,3に示すように、各プレート42,43は、径方向に延在する略リング状の平板部42a,43aと、平板部42a,43aの内周面から軸方向に延在する略円筒形状の円環部42b,43bと、平板部42a,43aの外周面から軸方向に延在する略円筒形状の円環部42c,43cとを有する。円環部42b、43bの内周面は、ロウ付けまたは溶接などによりパイプ41の外周面に接合され、これによりパイプユニット40が形成される。 As shown in FIGS. It has a cylindrical annular portion 42b, 43b and a substantially cylindrical annular portion 42c, 43c extending axially from the outer peripheral surface of the flat plate portions 42a, 43a. The inner peripheral surfaces of the annular portions 42b and 43b are joined to the outer peripheral surface of the pipe 41 by brazing or welding, whereby the pipe unit 40 is formed.

図2に示すように、パイプ41の左右両端部は、それぞれケース5の左右側壁に設けられたパイプ支持孔55,56に、例えば圧入や軽圧入により嵌合される。パイプ支持孔55,56は、軸方向に段付き状に形成され、パイプ41の軸方向両端面が段付き部55a,56aに当接することで、パイプ41の軸方向位置が規制される。パイプユニット40の各プレート42,43の円環部42c、43cの外周面の径は、回転軸60の貫通孔62の内周面の径よりもわずかに(例えば1〜2mm程度)小さい。これによりパイプユニット40がケース5に固定された状態で、回転軸60はパイプユニット40に接触することなく回転することができる。 As shown in FIG. 2, the left and right ends of the pipe 41 are fitted into the pipe support holes 55 and 56 provided on the left and right side walls of the case 5, respectively, by press-fitting or light-fitting. The pipe support holes 55 and 56 are formed in a stepped shape in the axial direction, and the axial positions of the pipe 41 are regulated by the axial end surfaces of the pipe 41 abutting on the stepped portions 55a and 56a. The diameter of the outer peripheral surfaces of the annular portions 42c and 43c of the plates 42 and 43 of the pipe unit 40 is slightly smaller (for example, about 1 to 2 mm) than the diameter of the inner peripheral surface of the through hole 62 of the rotating shaft 60. As a result, the rotating shaft 60 can rotate without coming into contact with the pipe unit 40 while the pipe unit 40 is fixed to the case 5.

パイプユニット40が貫通孔62に挿入された状態で、位置A〜位置Dのそれぞれにおいて、左プレート42と右プレート43との間に、パイプ41と回転軸60とによって包囲された略円環状のオイル空間45A〜45Dが形成される。オイル空間45A〜45Dには回転軸60の貫通孔63A〜63Dがそれぞれ面しており、貫通孔63A〜63Dはそれぞれオイル空間45A〜45Dに連通する。 With the pipe unit 40 inserted in the through hole 62, in each of the positions A to D, a substantially annular shape surrounded by the pipe 41 and the rotating shaft 60 between the left plate 42 and the right plate 43. Oil spaces 45A to 45D are formed. Through holes 63A to 63D of the rotating shaft 60 face each of the oil spaces 45A to 45D, and the through holes 63A to 63D communicate with the oil spaces 45A to 45D, respectively.

図2,3に示すように、パイプ41には、左右一対のプレート42,43の間に、各オイル空間45A〜45Dに面して周方向複数の略円形の貫通孔44が開口される。これにより、貫通孔44を介してパイプ41の内部空間46とオイル空間45A〜45Dとが連通する。 As shown in FIGS. 2 and 3, a plurality of substantially circular through holes 44 in the circumferential direction are opened in the pipe 41 between the pair of left and right plates 42 and 43 facing the oil spaces 45A to 45D. As a result, the internal space 46 of the pipe 41 and the oil spaces 45A to 45D communicate with each other through the through hole 44.

本実施形態に係る潤滑油供給装置の主要な動作を説明する。オイルポンプ6の駆動により第1油路PA1、第2油路PA2(パイプ41)、第3油路PA3を潤滑油が流れる。このとき、流入口41aおよび流出口41bを介してパイプ41内を通過する潤滑油の一部は、図2の矢印に示すようにパイプ41の貫通孔44を通過して径方向外側のオイル空間45A〜45D内に導かれる。オイル空間45A〜45Dの潤滑油は、貫通孔63A〜63Dを介してそれぞれロータ11やベアリング32等に供給される。 The main operation of the lubricating oil supply device according to this embodiment will be described. Lubricating oil flows through the first oil passage PA1, the second oil passage PA2 (pipe 41), and the third oil passage PA3 by driving the oil pump 6. At this time, a part of the lubricating oil passing through the pipe 41 through the inflow port 41a and the outflow port 41b passes through the through hole 44 of the pipe 41 as shown by the arrow in FIG. It is guided within 45A to 45D. The lubricating oil of the oil space 45A~45D, respectively through the through-hole 63 A to 63 D is supplied to the rotor 11 and bearings 32, and the like.

ところで、回転軸60の各貫通孔63A〜63Dの開口面積は、各オイル空間45A〜45Dの外周面の面積よりも小さい。このため、オイル空間45A〜45Dから回転軸60の外側への潤滑油の流れにおいて、貫通孔63A〜63Dは絞りとして機能し、オイル空間45A〜45Dは潤滑油で満たされる。これにより、車両が傾斜した場合や車両に前後方向や左右方向の加速度が作用した場合であっても、オイル空間45A〜45Dに潤滑油の偏りが生じることを防止でき、回転軸60の周囲の各部に必要十分な量の潤滑油を供給することができる。 By the way, the opening area of each of the through holes 63A to 63D of the rotating shaft 60 is smaller than the area of the outer peripheral surface of each of the oil spaces 45A to 45D. Therefore, in the flow of the lubricating oil from the oil spaces 45A to 45D to the outside of the rotary shaft 60, the through holes 63A to 63D function as a throttle, and the oil spaces 45A to 45D are filled with the lubricating oil. As a result, even when the vehicle is tilted or when acceleration in the front-rear direction or the left-right direction acts on the vehicle, it is possible to prevent the lubricating oil from being biased in the oil spaces 45A to 45D, and it is possible to prevent the lubricating oil from being biased around the rotating shaft 60. A necessary and sufficient amount of lubricating oil can be supplied to each part.

パイプ41内の内部空間46の容積とオイル空間45A〜45Dの容積との和は、回転軸60の貫通孔62の全容積よりも小さい。このため、貫通孔62にパイプユニット40を設けた場合に必要とされる潤滑油量を、パイプユニット40を設けない場合に必要とされる潤滑油量よりも、低減することができる。これによりポンプ容量を低減することができ、オイルポンプ6を小型化できる。 The sum of the volume of the internal space 46 in the pipe 41 and the volumes of the oil spaces 45A to 45D is smaller than the total volume of the through hole 62 of the rotating shaft 60. Therefore, the amount of lubricating oil required when the pipe unit 40 is provided in the through hole 62 can be reduced to be smaller than the amount of lubricating oil required when the pipe unit 40 is not provided. As a result, the pump capacity can be reduced and the oil pump 6 can be miniaturized.

本実施形態によれば以下のような作用効果を奏することができる。
(1)潤滑油供給装置は、オイルポンプ6から供給された潤滑油を、回転軸60に軸方向に穿設された貫通孔62と、貫通孔62に連通して回転軸60を径方向に貫通する貫通孔63とを介して、回転軸60の周囲の各部(ロータ11、ベアリング32等)に供給するように構成される(図1)。この潤滑油供給装置は、軸方向に沿って貫通孔62に収容され、オイルポンプ6から供給された潤滑油が導かれるとともに、径方向に貫通孔44が穿設されたパイプ41と、パイプ41の外周面から回転軸60の内周面にかけて径方向に延在し、回転軸60の貫通孔63A〜63Dとパイプ41の貫通孔44とに連通する環状のオイル空間45A〜45Dを形成する左右一対のプレート42,43とを備える(図1〜3)。
According to this embodiment, the following effects can be obtained.
(1) The lubricating oil supply device communicates the lubricating oil supplied from the oil pump 6 through the through hole 62 formed in the rotary shaft 60 in the axial direction and the through hole 62 in the radial direction of the rotary shaft 60. It is configured to supply to each part (rotor 11, bearing 32, etc.) around the rotating shaft 60 via the through hole 63 through which the rotating shaft 60 is formed (FIG. 1). This lubricating oil supply device is accommodated in the through hole 62 along the axial direction, and the lubricating oil supplied from the oil pump 6 is guided to the pipe 41 and the pipe 41 in which the through hole 44 is bored in the radial direction. Left and right forming an annular oil space 45A to 45D extending radially from the outer peripheral surface of the rotary shaft 60 to the inner peripheral surface of the rotary shaft 60 and communicating with the through holes 63A to 63D of the rotary shaft 60 and the through holes 44 of the pipe 41. It includes a pair of plates 42, 43 (FIGS. 1 to 3).

この構成により、回転軸60の内部の潤滑油で満たされるべきオイル空間45A〜45Dの容積を、貫通孔62により形成される回転軸60内の容積よりも低減することができる。このため、ポンプ容量を低減することができ、オイルポンプ6を小型化できる。すなわち、車両の傾斜や車両に加速度が作用する場合に回転軸60の周囲の各部に十分な潤滑油を供給するためには、回転軸60の貫通孔63A〜63Dの上流側空間を潤滑油で満たしておく必要がある。この点、本実施形態では、パイプ41と左右一対のプレート42,43とにより、貫通孔63A〜63Dの上流側空間(オイル空間45A〜45D)を貫通孔62の容積よりも狭く構成したので、必要な潤滑油量が抑えられ、オイルポンプ6が小型化し、コストの上昇を防ぐことができる。また、必要潤滑油量が抑えられることで、潤滑および冷却を要する部位までの潤滑油の到達時間を短くすることができ、耐摩耗性や冷却性を向上することができる。さらに、潤滑油の迅速な供給によりフリクションを低減することもでき、燃費向上に資する。 With this configuration, the volume of the oil spaces 45A to 45D to be filled with the lubricating oil inside the rotary shaft 60 can be reduced to be smaller than the volume in the rotary shaft 60 formed by the through hole 62. Therefore, the pump capacity can be reduced and the oil pump 6 can be miniaturized. That is, in order to supply sufficient lubricating oil to each part around the rotating shaft 60 when the vehicle is tilted or acceleration acts on the vehicle, the space on the upstream side of the through holes 63A to 63D of the rotating shaft 60 is filled with the lubricating oil. Must be met. In this respect, in the present embodiment, the upstream space (oil space 45A to 45D) of the through holes 63A to 63D is configured to be narrower than the volume of the through hole 62 by the pipe 41 and the pair of left and right plates 42 and 43. The required amount of lubricating oil can be suppressed, the oil pump 6 can be miniaturized, and an increase in cost can be prevented. Further, by suppressing the required amount of lubricating oil, it is possible to shorten the arrival time of the lubricating oil to the portion requiring lubrication and cooling, and it is possible to improve wear resistance and cooling performance. Furthermore, friction can be reduced by promptly supplying lubricating oil, which contributes to improved fuel efficiency.

(2)回転軸60には軸方向に貫通して貫通孔62が設けられ、パイプ41は、貫通孔62を貫通し、その軸方向両端部は、回転軸60の軸方向両側に配置されたケース5のパイプ支持孔55,56に支持される(図2)。これにより回転軸60の内部にパイプ41およびパイプ41と一体の左右一対のプレート42,43を容易に配置することができる。 (2) The rotating shaft 60 is provided with a through hole 62 penetrating in the axial direction, the pipe 41 penetrates the through hole 62, and both ends thereof in the axial direction are arranged on both sides in the axial direction of the rotating shaft 60. It is supported by the pipe support holes 55 and 56 of the case 5 (FIG. 2). As a result, the pipe 41 and the pair of left and right plates 42, 43 integrated with the pipe 41 can be easily arranged inside the rotating shaft 60.

(3)回転軸60は、車両駆動装置100の一部を構成するとともに、略水平方向(左右方向)に延設される(図1)。このような構成の下では、回転軸60内で潤滑油が偏るおそれがあり、それを避けるためにオイルポンプ6が大型化する傾向にあるが、本実施形態では、回転軸60内にパイプユニット40を収容するので、オイルポンプ6を大型化することなく、回転軸60内の潤滑油の偏りを抑制することができる。 (3) The rotating shaft 60 constitutes a part of the vehicle driving device 100 and is extended in a substantially horizontal direction (left-right direction) (FIG. 1). Under such a configuration, the lubricating oil may be biased in the rotating shaft 60, and the oil pump 6 tends to be large in size in order to avoid it. However, in the present embodiment, the pipe unit is contained in the rotating shaft 60. Since the 40 is accommodated, it is possible to suppress the bias of the lubricating oil in the rotating shaft 60 without increasing the size of the oil pump 6.

(4)回転軸60の貫通孔63A〜63Dとパイプ41の貫通孔44とは、それぞれ軸方向複数箇所(位置A〜位置D)に穿設され、左右一対のプレート42,43は、軸方向複数の貫通孔63A〜63D,44に対応して軸方向複数箇所に設けられる(図2)。これにより、回転軸60の周囲の軸方向複数個所の部品(ロータ11やベアリング32など)に対し、パイプ41を流れる潤滑油の一部を同時に供給することができる。 (4) The through holes 63A to 63D of the rotating shaft 60 and the through holes 44 of the pipe 41 are bored at a plurality of positions (positions A to D) in the axial direction, respectively, and the pair of left and right plates 42 and 43 are provided in the axial direction. It is provided at a plurality of positions in the axial direction corresponding to the plurality of through holes 63A to 63D, 44 (FIG. 2). As a result, a part of the lubricating oil flowing through the pipe 41 can be simultaneously supplied to a plurality of axial parts (rotor 11, bearing 32, etc.) around the rotating shaft 60.

なお、上記実施形態では、回転軸60に対し軸方向に貫通孔62(第1孔)を穿設したが、例えば軸方向一端部を閉塞するなどして第1孔を、回転軸60を貫通させずに設けてもよい。この場合、パイプユニットの軸方向一端側をケースで片持ち支持するようにしてもよい。上記実施形態では、それぞれのオイル空間45A〜45Dに面して回転軸60に軸方向単一の貫通孔63A〜63D(第2孔)を穿設したが、少なくともいずれかのオイル空間45A〜45Dに面して軸方向複数の貫通孔を第2孔として設けてもよい。 In the above embodiment, the through hole 62 (first hole) is bored in the axial direction with respect to the rotary shaft 60, but the first hole is penetrated through the rotary shaft 60 by, for example, closing one end in the axial direction. It may be provided without letting it. In this case, one end side of the pipe unit in the axial direction may be cantilevered and supported by the case. In the above embodiment, a single axial through hole 63A to 63D (second hole) is formed in the rotating shaft 60 facing the respective oil spaces 45A to 45D, but at least one of the oil spaces 45A to 45D is formed. A plurality of axial through holes may be provided as second holes facing the surface.

上記実施形態では、パイプ41の外周面に左右一対のプレート42,43を固定してパイプユニット40を構成したが、パイプユニットの構成はこれに限らない。すなわち、軸方向に沿って第1孔に収容され、オイルポンプから供給された潤滑油が導かれるのであれば、管部材の構成は上述したものに限らず、この管部材の外周面から第1孔の周面にかけて径方向に延在し、第2孔と貫通孔とに連通する環状空間を形成するのであれば、板部材の構成も上述したものに限らない。 In the above embodiment, the pipe unit 40 is configured by fixing a pair of left and right plates 42, 43 to the outer peripheral surface of the pipe 41, but the configuration of the pipe unit is not limited to this. That is, if the lubricating oil accommodated in the first hole along the axial direction and supplied from the oil pump is guided, the configuration of the pipe member is not limited to the above-mentioned one, and the first from the outer peripheral surface of the pipe member. The configuration of the plate member is not limited to that described above as long as it extends radially toward the peripheral surface of the hole and forms an annular space communicating with the second hole and the through hole.

上記実施形態では、走行モータ1の回転軸60の軸方向貫通孔62にパイプユニット40を収容するようにしたが、他の回転軸の内部にパイプユニットを収容するようにしてもよい。この場合、パイプおよび回転軸を径方向に貫通する貫通孔の軸方向における配置は、回転軸の周囲の部品の配置によって適宜定められる。上記実施形態では、潤滑油供給装置を車両駆動装置100に適用したが、本発明は、車両駆動装置以外にも同様に適用することができる。 In the above embodiment, the pipe unit 40 is accommodated in the axial through hole 62 of the rotating shaft 60 of the traveling motor 1, but the pipe unit may be accommodated inside another rotating shaft. In this case, the axial arrangement of the pipe and the through hole penetrating the rotating shaft in the radial direction is appropriately determined by the arrangement of the parts around the rotating shaft. In the above embodiment, the lubricating oil supply device is applied to the vehicle drive device 100, but the present invention can be similarly applied to other than the vehicle drive device.

以上の説明はあくまで一例であり、本発明の特徴を損なわない限り、上述した実施形態および変形例により本発明が限定されるものではない。上記実施形態と変形例の1つまたは複数を任意に組み合わせることも可能であり、変形例同士を組み合わせることも可能である。 The above description is merely an example, and the present invention is not limited to the above-described embodiments and modifications as long as the features of the present invention are not impaired. It is also possible to arbitrarily combine one or a plurality of the above-described embodiments and the modified examples, and it is also possible to combine the modified examples.

5 ケース、6 オイルポンプ、40 パイプユニット、41 パイプ、42,43 プレート、44 貫通孔、45A〜45D オイル空間、60 回転軸、62 貫通孔、63A〜63D 貫通孔、100 車両駆動装置 5 Cases, 6 Oil Pumps, 40 Pipe Units, 41 Pipes, 42, 43 Plates, 44 Through Holes, 45A-45D Oil Spaces, 60 Rotating Shafts, 62 Through Holes, 63A-63D Through Holes, 100 Vehicle Drives

Claims (3)

オイルポンプから供給された潤滑油を、回転軸に穿設された軸方向の第1孔と、前記第1孔に連通して前記回転軸を径方向に貫通する第2孔とを介して、前記回転軸の周囲の各部に供給する潤滑油供給装置であって、
軸方向に沿って前記第1孔に収容され、前記オイルポンプから供給された潤滑油が導かれるとともに、径方向に貫通孔が穿設された管部材と、
前記管部材の外周面から前記第1孔の周面にかけて径方向に延在し、前記第2孔と前記貫通孔とに連通する環状空間を形成する軸方向一対の板部材と、を備え
前記第2孔と前記貫通孔とは、それぞれ軸方向複数箇所に穿設され、前記一対の板部材は、軸方向複数の前記第2孔と前記貫通孔とに対応して軸方向複数箇所に設けられることを特徴とする潤滑油供給装置。
Lubricating oil supplied from the oil pump is passed through a first hole in the axial direction formed in the rotary shaft and a second hole that communicates with the first hole and penetrates the rotary shaft in the radial direction. A lubricating oil supply device that supplies each part around the rotating shaft.
A pipe member accommodated in the first hole along the axial direction, to which the lubricating oil supplied from the oil pump is guided, and a through hole is formed in the radial direction.
A pair of axial plate members extending in the radial direction from the outer peripheral surface of the pipe member to the peripheral surface of the first hole and forming an annular space communicating with the second hole and the through hole are provided .
The second hole and the through hole are bored at a plurality of axial directions, respectively, and the pair of plate members are provided at a plurality of axial directions corresponding to the plurality of the second holes and the through holes in the axial direction. A lubricating oil supply device characterized by being provided.
請求項1に記載の潤滑油供給装置において、
前記第1孔は、前記回転軸を軸方向に貫通して設けられ、
前記管部材は、前記第1孔を貫通し、その軸方向両端部は、前記回転軸の軸方向両側に配置されたケースに支持されることを特徴とする潤滑油供給装置。
In the lubricating oil supply device according to claim 1,
The first hole is provided so as to penetrate the rotation axis in the axial direction.
A lubricating oil supply device, wherein the pipe member penetrates the first hole, and both ends thereof in the axial direction are supported by cases arranged on both sides in the axial direction of the rotating shaft.
請求項1または2に記載の潤滑油供給装置において、
前記回転軸は、車両駆動装置の一部を構成するとともに、略水平方向に延設されることを特徴とする潤滑油供給装置。
In the lubricating oil supply device according to claim 1 or 2.
The rotary shaft constitutes a part of a vehicle drive device and is a lubricating oil supply device characterized by being extended in a substantially horizontal direction.
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